Of course, the runaway leaders have been Nico Rosberg and Lewis Hamilton. The Mercedes drivers have been in a class of their own at the front of the field with the W05 Hybrid car, and their tussle for the title is set to continue for the rest of the season.

Further back, we have seen a number of breakout performances and results for some of the younger drivers, whilst some have underperformed and struggled to make much of an impact. Here are our rankings for the year so far.

Lewis Hamilton (Mercedes) – Grade: A+He may not lead the championship, but Lewis Hamilton is certainly giving it his all to secure a second world title this year. Five wins and two incredible comebacks in Germany and Hungary leave him just eleven points behind Rosberg at the top.Highlight so far: His monster defence to keep Rosberg back in Bahrain.

Daniel Ricciardo (Red Bull) – Grade: A+When Daniel joined Red Bull, few gave him a hope in hell of beating Sebastian Vettel. However, after half a season, he has won two races and is 43 points clear of his four-time world champion of a teammate. Quickly proving himself to be the real deal at Red Bull.Highlight so far: His moves on Hamilton and Alonso to win in Hungary.

Nico Rosberg (Mercedes) – Grade: ALike Lewis, Nico Rosberg has excelled with the W05 Hybrid, but he hasn’t quite had that killer instinct his teammate has shown. Nevertheless, he leads the world championship with eight races to go and is in the box seat to win a first world title.Highlight so far: Winning on home soil (twice) in Monaco and Germany.

Valtteri Bottas (Williams) – Grade: AMaybe we’re being generous with the A grades here, but Bottas deserves one just as much as the others. The flying Finn has led Williams’ charge in 2014, and is quickly establishing himself to be a star for the future.Highlight so far: Charging from a Q1 dropout to second place at Silverstone.

Fernando Alonso (Ferrari) – Grade: B+This might be a bit harsh to grade Alonso like this, but B+ is still a great score given the state of the F14 T car. He continues to fight on his own, dragging the car to two podium finishes and enjoying some awesome battles on the way.Highlight so far: Nearly winning the Hungarian GP with a genius strategy; eventually came home second.

Nico Hulkenberg (Force India) – Grade: B+Yet again in 2014, Nico Hulkenberg is proving to the bigger teams that he deserves a seat with them. He has led Force India’s charge, scoring points in all but one race, and surely must score that overdue podium finish in the second half of the year.Highlight so far: Battle with Perez for the podium in Bahrain, even if he did come fifth in the end.

Sebastian Vettel (Red Bull) – Grade: BSeb didn’t stand much chance of defending his world title with the troublesome Renault power unit, so the real marker is his teammate. The fact that he is trailing Ricciardo and wasn’t the man to score both of the team’s wins proves that he is struggling in 2014 (if you were in need of proof…).Highlight so far: Keeping Rosberg in sight in Malaysia before finishing third.

Felipe Massa (Williams) – Grade: BThe popular Brazilian has looked like a new man since leaving Ferrari. With Williams, he is happy and he is quick. He has suffered some rotten luck this year, and would otherwise be higher than ninth in the standings.Highlight so far: Shock pole position in Austria ahead of Bottas and the Mercedes cars.

Jules Bianchi (Marussia) – Grade: BAs we said in the teams’ review, it’s difficult to grade the backmarkers. However, Bianchi has been a revelation for Marussia, scoring its first ever points in F1 at the Monaco Grand Prix. A successful test with Ferrari has also helped his stock to rise, but will a bigger team come calling for 2015?Highlight so far: Points in Monaco, a remarkable result for all at Marussia.

Jenson Button (McLaren) – Grade: BIt’s been an okay season so far for Jenson Button. 2013 was a disaster, and although 2014 started with a podium-by-default in Australia, the Briton hasn’t done a great deal more. Some good one-off results, but lacks the spark of his earlier years with McLaren.Highlight so far: Coming so close to the podium at the British GP as Silverstone turned Pink for Papa.

Kevin Magnussen (McLaren) – Grade: B-It has been a similar story on the other side of the McLaren garage. Magnussen hasn’t done a great deal of note since his podium in Australia, but has been consistent if not spectacular. Again, his abilities seem to be masked by the MP4-29 car.Highlight so far: Second place on debut in Australia after Ricciardo’s DSQ.

Sergio Perez (Force India) – Grade: B-A good start to the season for Perez following his McLaren sacking, with the podium finish in Bahrain being Force India’s first since 2009. However, we have seen a few mistakes cost him big results (Canada for example). A good start to 2014 all the same.Highlight so far: Third place in Bahrain after seeing off the Williams drivers and Hulkenberg.

Daniil Kvyat (Toro Rosso) – Grade: C+Not a bad start to life in Formula 1. With a bit more luck, Kvyat may have scored more than his current haul of six points. Appears to have had the edge on Vergne despite his relative inexperience and has been strong in qualifying, but will want more points in the final eight races.Highlight so far: P9 on debut in Australia; qualifying in Austria another good result.

Jean-Eric Vergne (Toro Rosso) – Grade: CVergne leads Toro Rosso’s charge with eleven points to Kvyat’s six, but he hasn’t done a huge amount to prove to the team he is worth keeping for 2015. Will need more races like the one in Hungary to stand a chance of staying on for next season.Highlight so far: Running second in Hungary and keeping the Mercedes cars at bay; finished ninth.

Romain Grosjean (Lotus) – Grade: CRoGro has transformed himself from a crash kid into a star for the future over the past year, and eight points is a commendable haul given the torture that the E22 car has given Lotus. He is doing very well to keep the team’s flag flying this year.Highlight so far: Eighth in Spain after qualifying fifth for Lotus.

Adrian Sutil (Sauber) – Grade: C-In a terrible year for Sauber, Adrian Sutil has struggled to even get close to the top ten. When he has looked to be in with a chance, mistakes have been made (such as the spin in Germany). A very average season so far from the German driver.Highlight so far: 11th in Hungary when the car didn’t look as bad.

Kimi Raikkonen (Ferrari) – Grade: D+If Sauber is the most disappointing team of the season so far, then Kimi Raikkonen is the most disappointing driver. The so-called ‘superteam’ he formed with Alonso at Ferrari hasn’t delivered – or, more accurately, he hasn’t delivered. 27 points and a best finish of sixth is just embarrassing.Highlight so far: Sixth in Hungary, and still he remained anonymous for much of the race.

Max Chilton (Marussia) – Grade: DPerhaps the most average driver out there, Chilton hasn’t done a huge amount to set the world on fire in 2014. He did enjoy the measure on Bianchi to begin with, but has since fallen back behind. Most notable moment was taking his teammate out in Canada.Highlight so far: 13th in Bahrain. Not really much more to add.

Esteban Gutierrez (Sauber) – Grade: DJust like Sutil, Gutierrez has struggled with the Sauber C33 car, but he too has made some costly errors. In Monaco, points were on the cards until he spun the car and couldn’t get it back going, and otherwise the Mexican has been very quiet all season. Needs a change soon.Highlight so far: Hungarian GP weekend when points looked possible; sidelined by a problem on the car.

Kamui Kobayashi (Caterham) – Grade: DIt’s been a tough year for Caterham, but Kobayashi hasn’t set the world on fire with his performances. Brought in for his experience, the signs are that it could be him who gets the chop if a pay driver comes knocking. Nothing really of note for the popular Japanese racer.Highlight so far: His reaction to a question about the World Cup in a press conference, saying “I don’t care!” and claiming that Japan are rubbish at football.

Pastor Maldonado (Lotus) – Grade: EThe jokes about Pastor Maldonado this season have only continued. Crashes in qualifying for the Chinese and Spanish Grands Prix didn’t do him much good, nor has the fact that he hasn’t matched Grosjean for pace when the car has been going.Highlight so far: Confirmation of a seat with the team for 2015. Yes, really.

Marcus Ericsson (Caterham) – Grade: EPut Ericsson in the same box as Chilton marked “average”. Nothing special this year, has rarely looked like scoring points even if he did come close in Monaco. Unlikely to stick around for 2015 if bigger bucks can be found by the new owners.Highlight so far: P11 in Monaco.